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Universal Audio

Universal Audio 710 Twin-Finity Mic Pre & DI Box

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Overview

100% tube to 100% solid state, a variable tone blending mic preamp & DI.

The award-winning 710 Twin-Finity is a radically new UA mic preamp design that combines both the classic retro warmth of tubes with the transient bite of solid-state, all in a 2U, half-rack unit. The 710 was created specifically to add the tonal versatility and sonic inspiration missing from generic audio interface preamps. Tone blending is continually variable between 100% tube and 100% solid-state, offering a practically infinite range of unique preamp tones, plus the ability to easily dial-in your own signature sound. There are lots of sensibly priced solid-state and tube preamplifiers out there, but the 710 is the only one that offers the best of both worlds - as well as everything in-between - all in one box, and within reach of any serious project studio's budget.

The key to its sonic flexibility lies in its innovative circuit design, featuring a solid-state transimpedance input amp simultaneously driving separate, phase-aligned tube and solid-state gain stages, which are then summed to a single output. The mix between the 310 volt single-ended class-A triode tube stage and solid-state transimpedance stage is controlled via the "Blend Knob" labeled "ˆž". Blending is continually variable between 100% tube and 100% solid-state offering a practically infinite range of unique pre-amp tones and the ability to easily dial-in your own signature sound.

Like all our other preamp designs, the 710 features dual gain-stage controls (Gain/Level) which can radically vary the amount of coloration and distortion by allowing you to crank up the input gain like a guitar amp. The VU meter features a unique "Drive" mode allowing you to see how hard you are driving the input stage.

Versatility makes the 710 the perfect preamp partner for any mic collection. Plus, the discrete JFET DI input circuit can also easily handle any electric instrument. Guitar and bass players will especially appreciate the 710s ability to bring out the best of both active and passive pickups. The 710 Twin-Finity includes a 19" rack-kit for mounting one or two units.

Features

  • Twin-Finity tone-blending mic/line preamp & Hi-Z instrument DI
  • Dual-Path 310 volt Class-A tube and transimpedance Solid State preamp
  • Phase-aligned "Tone-Blending" of tube and Solid State
  • Dual Gain Stages: wire with gain to creamy to crunchy
  • Discrete JFET DI with 2.2M ohm Ultra Hi-Z impedance
  • 70dB+ of gain, +48V Phantom, Pad(-15dB), Phase Invert, and Low Cut Filter(75Hz)
  • 19" Rack kit included, optional desktop handle kit also available
  • Heavy-duty metal construction
Specs

710 Twin-Finity Mic Pre & DI Box Specifications:

Inputs
  • Microphone (Female XLR)
  • Balanced Line (Female XLR)
  • Unbalanced Instrument (1/4" jack) (D.I.)
Outputs
  • Balanced Line (Male XLR)
Type
  • Tube & Solid-State Phase-Aligned Tone-Blending Mic Pre & DI
Tube Complement
  • 12ax7
Pad
  • -15dB
High Pass Filter
  • 75Hz
Maximum Power Consumption
  • 160mA @120VAC
  • 20W
Power Requirements
  • 100-240VAC
Dimensions
  • 8.45W x 3.5H x 10.25D
Weight
  • 5.25 lb
Impedance
  • :
Mic Input Impedance
  • 2K ohms
Line Input Impedance
  • 10K ohms
Hi-Z Input Impedance
  • 2.2M ohms
Internal Output Impedance
  • 600 ohms
Gain/Levels:
    Gain Range for Unit
    • -Infinity to 70dBu
    Mic Range Gain Pot
    • 10 60 dBu
    Line Range Gain Pot
    • -10 40 dBu
    Hi-Z Range Gain Pot
    • -10 40 dBu
    • Maximum Mic Input Level Gain @min SS
    • +18 dBu
    • Maximum Mic Input Level Gain @min Tube 1% THD
    • -7 dBu dBu +8 dBu w/pad
    • Maximum Line Input Level Gain @ Min SS
    • +30
    • Maximum Line Input Level Gain @ Min Tube 1% THD
    • +8 dBu
    • Maximum Hi-Z Input Level Gain Min SS
    • +18
    • Maximum Hi-Z Input Level Gain Min Tube 1% THD
    • +8 dBu
    • Maximum Output Level into 600 ohms
    • +18 dBu
    • Maximum Output Level into 100k ohms
    • +28 dBu
    • Tube Clipping Level
    • Same as Max In
    • Solid-State Clipping Level
    • Same as Max In
    Frequency Response:
      Mic Frequency Response
      • 20Hz to 100kHz +/- 0.2 dBu
      Line Frequency Response
      • 20Hz to 100kHz +/- 0.2 dBu
      Hi-Z Frequency Response
      • 20Hz to 100kHz +/- 0.2 dBu
      Distortion
      • Min THD+Noise @ +4dBU
      • 0.1% tube 0.005% solid-state
      Q&A
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